Adding some comments

src/de/teamteamteam/spacescooter/background/Background.java

@@ -2,6 +2,9 @@ package de.teamteamteam.spacescooter.background;
 
 import de.teamteamteam.spacescooter.entity.Entity;
 
+/**
+ * Class for all backgrounds that are painted in the background of the level
+ */
 public abstract class Background extends Entity {
 
 	public Background(int x, int y) {

src/de/teamteamteam/spacescooter/background/StarBackground.java

@@ -2,19 +2,30 @@ package de.teamteamteam.spacescooter.background;
 
 import java.awt.Graphics2D;
 
-
+/**
+ * The StarBackground of the first level
+ */
 public class StarBackground extends Background {
 	
 	private int y;
-
+	
+	/**
+	 * Constructor for the background
+	 */
 	public StarBackground(int x, int y) {
 		super(x, y);
 		this.y = y;
 		this.setImage("images/starbackground.png");
 	}
 
+	/**
+	 * offset in x-direction for the painting
+	 */
 	private int offset = 0;
 	
+	/**
+	 * standart update method
+	 */
 	public void update() {
 		this.offset -= 2;
 		//System.out.println(this.offset);
@@ -23,6 +34,9 @@ public class StarBackground extends Background {
 		}
 	}
 	
+	/**
+	 * standart paint method
+	 */
 	public void paint(Graphics2D g) {
 		g.drawImage(this.getImage(), (0+this.offset), this.y, null);
 		g.drawImage(this.getImage(), (this.getImage().getWidth()+this.offset), this.y, null);

src/de/teamteamteam/spacescooter/datastructure/Score.java

@@ -1,18 +1,33 @@
 package de.teamteamteam.spacescooter.datastructure;
 
+/**
+ * Score Class to represent the Player's Score
+ */
 public class Score {
-	
+
+	/**
+	 * Score can be between 0 and 99999999
+	 */
 	private static int score = 0;
 	private static int maxScore = 99999999;
 
+	/**
+	 * Getter for the Score
+	 */
 	public static int getScore() {
 		return score;
 	}
 
+	/**
+	 * Setter for the Score
+	 */
 	public static void setScore(int score) {
 		Score.score = score;
 	}
-	
+
+	/**
+	 * Method for adding Score
+	 */
 	public static void addScore(int score) {
 		if (Score.score + score >= Score.maxScore) {
 			Score.setScore(Score.maxScore);
@@ -20,7 +35,10 @@ public class Score {
 			Score.score += score;
 		}
 	}
-	
+
+	/**
+	 * Method for removing Score
+	 */
 	public static void removeScore(int score) {
 		if (Score.score - score <= 0) {
 			Score.setScore(0);

src/de/teamteamteam/spacescooter/entity/Player.java

@@ -10,13 +10,35 @@ import de.teamteamteam.spacescooter.entity.spi.Collidable;
 import de.teamteamteam.spacescooter.sound.SoundSystem;
 import de.teamteamteam.spacescooter.utility.GameConfig;
 
+/**
+ * Class that represents the Player, and handle all the KeyboardActions
+ */
 public class Player extends ShootingEntity implements KeyboardListener {
-	
+
+	/**
+	 * the Player's Keyboard
+	 */
 	private Keyboard keyboard = null;
-	private double healthPercent = 0;
-	private double shieldPercent = 0;
-	private int rocketAmount = 1;
 	
+	/**
+	 * the Players Health Points in percent
+	 */
+	private double healthPercent = 0;
+	
+	/**
+	 * the Players ShieldPoints in percent
+	 */
+	private double shieldPercent = 0;
+	
+	/**
+	 * the Players Rocket Ammunition
+	 */
+	private int rocketAmount = 1;
+
+	
+	/**
+	 * Constructor for initializing the Player on the GameScreen
+	 */
 	public Player(int x, int y) {
 		super(x, y);
 		this.setImage("images/ship.png");
@@ -32,11 +54,17 @@ public class Player extends ShootingEntity implements KeyboardListener {
 		this.registerOnKeyboard(Keyboard.getInstance());
 	}
 
+	/**
+	 * Method for register the Player on the Keyboard 
+	 */
 	private void registerOnKeyboard(Keyboard keyboard) {
 		this.keyboard = keyboard;
 		this.keyboard.addListener(this);
 	}
 
+	/**
+	 * Standard update method
+	 */
 	public void update() {
 		if (StaticValue.HealthPoints != 0) {
 			this.healthPercent = ((double) this.getHealthPoints() / (double) StaticValue.HealthPoints) * 100;
@@ -83,12 +111,18 @@ public class Player extends ShootingEntity implements KeyboardListener {
 		}
 	}
 	
+	/**
+	 * Explode method that trigger the ShootingEntity.explode() method and play a nice sound
+	 */
 	@Override
 	public void explode() {
 		super.explode();
 		SoundSystem.playSound("sounds/abgang.wav");
 	}
 	
+	/**
+	 * createShot method that trigger the ShootingEntity.createShot() method and play a nice sound
+	 */
 	@Override
 	public void createShot() {
 		super.createShot();
@@ -107,6 +141,9 @@ public class Player extends ShootingEntity implements KeyboardListener {
 		super.remove();
 	}
 
+	/**
+	 * keyPressed method, comes in handy when a key on the keyboard is pressed
+	 */
 	public void keyPressed(KeyEvent e) {
 		//spontaneous fire happens here
 		if(e.getKeyCode() == KeyEvent.VK_SPACE) {
@@ -114,6 +151,9 @@ public class Player extends ShootingEntity implements KeyboardListener {
 		}
 	}
 
+	/**
+	 * keyReleased method, reacts if a key on the keyboard is released
+	 */
 	public void keyReleased(KeyEvent e) {
 		//space up -> reset shot cooldown
 		if(e.getKeyCode() == KeyEvent.VK_SPACE) {
@@ -121,16 +161,28 @@ public class Player extends ShootingEntity implements KeyboardListener {
 		}
 	}
 
+	/**
+	 * empty keyTyped method, maybe useful for cheatcodes later
+	 */
 	public void keyTyped(KeyEvent e) {}
 	
+	/**
+	 * return the Healthpercentage of the Player
+	 */
 	public int getHealthPercent() {
 		return (int) this.healthPercent;
 	}
 	
+	/**
+	 * return the Shieldpercentage of the Player
+	 */
 	public int getShieldPercent() {
 		return (int) this.shieldPercent;
 	}
-	
+
+	/**
+	 * method for increasing the HealthPoints with the Heal-Item
+	 */
 	public void increaseHealthPoints(int inc) {
 		if (this.getHealthPoints() <= 85) {
 			this.setHealthPoints(getHealthPercent() + inc);

src/de/teamteamteam/spacescooter/entity/StaticValue.java

@@ -1,18 +1,39 @@
 package de.teamteamteam.spacescooter.entity;
 
+/**
+ * Static Values for the Player and the Shop
+ *
+ */
 public class StaticValue {
-	
+	//Player
 	/**
-	 * Values for the player
+	 * the ShootDamage of the Player
 	 */
 	public static int ShootDamage = 5;
-	public static int HealthPoints = 100;
-	public static int ShieldPoints = 100;
 	
 	/**
-	 * Values for the shop
+	 * the HealthPoints of the Player may be changed by the 1Up-Item
+	 */
+	public static int HealthPoints = 100;
+	
+	/**
+	 * the ShieldPoints of the Player
+	 */
+	public static int ShieldPoints = 100;
+	
+	//Shop
+	/**
+	 * The Damage Value of the Shop
 	 */
 	public static int schaden = 0;
+	
+	/**
+	 * the Shield value of the Shop
+	 */
 	public static int schild = 0;
+	
+	/**
+	 * the Health value of the Shop
+	 */
 	public static int leben = 0;
 }

src/de/teamteamteam/spacescooter/entity/enemy/Enemy.java

@@ -4,9 +4,16 @@ import de.teamteamteam.spacescooter.entity.ShootingEntity;
 import de.teamteamteam.spacescooter.entity.shot.Shot;
 import de.teamteamteam.spacescooter.sound.SoundSystem;
 import de.teamteamteam.spacescooter.utility.Random;
-
+/**
+ * The Enemy class that handle all the Enemies out there.
+ * Including bosses and minibosses.
+ * This class inherit all the properties of the enemies to every subclass
+ */
 public abstract class Enemy extends ShootingEntity {
 
+	/**
+	 * Constructor for one Enemy, which will construct a ShootingEntity 
+	 */
 	public Enemy(int x, int y) {
 		super(x, y);
 		this.name = "EnemyOne";
@@ -15,9 +22,19 @@ public abstract class Enemy extends ShootingEntity {
 		this.setShootDamage(5);
 	}
 
+	/**
+	 * Name of the Enemy
+	 */
 	protected String name;
+	
+	/**
+	 * boolean value that will determine whether a new spawned enemy will shoot or not
+	 */
 	protected boolean willShoot;
 	
+	/**
+	 * standard update method
+	 */
 	public void update() {
 		super.update();
 		if(willShoot == true)